From: Axel Lin <axel.lin@ingics.com>
Date: Thu, 27 Mar 2014 01:26:38 +0000 (+0800)
Subject: spi: atmel: Make current_remaining_bytes to be int
X-Git-Tag: firefly_0821_release~176^2~3735^2~4^3~1
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=0c3b97487d15a452f1fa7bfd9b6f1bd1a31d538d;p=firefly-linux-kernel-4.4.55.git

spi: atmel: Make current_remaining_bytes to be int

Don't use unsigned for current_remaining_bytes so we can check
current_remaining_bytes < 0 case.
Use int is enough for current_remaining_bytes.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
---

diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c
index 8005f9869481..485e6cce94bf 100644
--- a/drivers/spi/spi-atmel.c
+++ b/drivers/spi/spi-atmel.c
@@ -224,7 +224,7 @@ struct atmel_spi {
 	struct platform_device	*pdev;
 
 	struct spi_transfer	*current_transfer;
-	unsigned long		current_remaining_bytes;
+	int			current_remaining_bytes;
 	int			done_status;
 
 	struct completion	xfer_completion;
@@ -1110,6 +1110,8 @@ static int atmel_spi_one_transfer(struct spi_master *master,
 				atmel_spi_next_xfer_pio(master, xfer);
 			} else {
 				as->current_remaining_bytes -= len;
+				if (as->current_remaining_bytes < 0)
+					as->current_remaining_bytes = 0;
 			}
 		} else {
 			atmel_spi_next_xfer_pio(master, xfer);